Soil Fertility and Animal Health

Albrecht, Wm. A.

doi:10.1097/00010694-195905000-00014

Cited by 14 publications

(13 citation statements)

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“…Hence, the starch granule structure will also be changed. As reported by Albrecht [35], hard wheats become soft wheats when grown on deficient ground and the soR wheats can be converted back into hard wheats with good soil. Schiitte [ 361 has shown that deficiencies of trace elements reduces the amount of specific vitamins and proteins, and hence this result on wheat may not be expected.…”

Section: The Production Of Permanent Repressors and Consequently New mentioning

confidence: 80%

“…Various studies have shown that if the soil fertility is good, then the resistance to insects is high. Thus Albrecht [35] has shown that spinach grown in fertile soil resisted the attack of thrips, whereas that grown on poor soil was destroyed by these insects. A deficiency of phosphorus or magnesium produced tomatoes which were susceptible to the greenhouse white fly, whereas those grown on good soil were not.…”

Section: The Production Of Permanent Repressors and Consequently New mentioning

confidence: 99%

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The Mechanism for the Synthesis of Starch and Its Relationship to Flagellin and to the Newly Proposed Structural Model for DNA. Part II.

Erlander¹

1970

Starch Stärke

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All of the components and enzymes required for the synthesis of starch by the glycogen precursor method have now been shown to exist. In this mechanism, the genetic inducer sucrose stimulates the production of phosphorylase and the Q‐enzyme. These and other enzymes in turn convert sucrose to glycogen. The external branches of the glycogen are then removed by the debranching enzyme isoamylase. The removed branches act as substrates, necessary co‐enzymes, suppliers of adenosine diphosphate glucose (ADPG), and possibly genetic inducers for the production and enzymatic activity of glucosyltransferase. They are converted into ADPG by the D‐enzyme plus other enzymes and then into amylose. Consequently, the percentage of amylose is directly proportional to the degree of debranching of amylopectin, which in turn is determined by how long amylopectin can be retained in the plastid solution before precipitating with isoamylase or other enzymes to form starch. The ability of the above specialized mechanisms to occur in the same solution is thus a result of selective complexing of enzymes to different polysaccharides and the production of different genetic inducers. Thus the interaction of different inducers with DNA repressors determines the time‐sequence for the production of specific enzymes. The thermal stability of thermophile flagellins and the inability of 6 M guanidinium chloride (GCl) to dissociate mesophile flagellin dimers (Mw = 40,000) or thermophile flagellin trimers (Mw 54,000) supports the conclusion that protein‐amylopectin complexes exist and cannot be readily dissociated. Because hydroxyls are involved in these flagellin aggregates, then the hydroxyls of much larger amylopectin molecules should also be able to form similar stable bonds with proteins. It is proposed that mutations can be caused by either elimination of active genes by feed‐back mechanisms (permanent repressors) or by chemicals and radiation. New genetic strains of grains produced by radiation for resistance to pests can thus only lead to disaster. Improvement of the soil is the only means for the production of lasting resistant strains.

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Section: The Production Of Permanent Repressors and Consequently New mentioning

confidence: 80%

Section: The Production Of Permanent Repressors and Consequently New mentioning

confidence: 99%

The Mechanism for the Synthesis of Starch and Its Relationship to Flagellin and to the Newly Proposed Structural Model for DNA. Part II.

Erlander¹

1970

Starch Stärke

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“…The combined percentage of Na and H in both sites was less than 1%. A base saturation ratio of 65-75% Ca, 10-15% Mg, 2-5% K, 0.5-3% Na, and 10-15% H has been described as optimum for soil and plant health 29,30 , although a review of over 100 published studies and experimental results over a 3-year period indicated that the benefits of proper cation balancing are site-specific 31 .…”

Section: Discussionmentioning

confidence: 99%

Yield potential and soil quality under alternative crop production practices for fresh market pepper

Chellemi

Rosskopf

2004

RAF

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This study was conducted in Florida in 1999 and 2000 to examine the impact of alternative crop production practices on soil quality and yields of fresh market pepper (Capsicum annuum). Replicated field plots were established on an organic vegetable farm that had been under certification for 5 years and on a conventional pepper farm that had been fumigated with methyl bromide for 25 consecutive years. Production practices evaluated included raised beds covered by white plastic mulch, soil solarization, no-till in a stubble crop of sunn hemp (Crotolaria juncea) or iron-clay pea (Vigna unguiculata) and the addition of 67 t ha -1 of urban plant debris (UPD). Soil fumigation with methyl bromide-chloropicrin was also evaluated at the conventional farm site. Soil organic carbon significantly increased following the addition of UPD in both years at the organic site but only in the second year at the conventional site. Cation exchange capacity increased significantly after addition of UPD in both years at both sites and a significant interaction with production practices was observed in the second year at the organic site. Soil phosphorus levels were high at both sites but were not impacted by production practices or UPD. In 1999, the addition of UPD significantly decreased soil nitrate levels at the organic site and the conventional site, except under the no-till treatments. In 2000, soil nitrate levels were not affected by UPD or production practice. Stand counts, determined by the number of surviving pepper plants 21-28 days after transplanting, were severely impacted in notill treatments due to intense competition from weeds. Marketable yields equal to, or above, the 1999/2000 statewide average for conventional production systems were obtained with soil fumigation and soil solarization at the conventional site in 1999. In 2000, an epidemic of Phytophthora blight (Phytophthora capsici) eliminated production at the conventional site. Marketable yield at the organic site approached the statewide average for conventional systems under the solarization treatment. Yields under plastic mulch were increased at both sites with the addition of UPD. The results demonstrated that organic pepper yields from soil-solarized plots were similar to yields obtained by conventional farmers using high inputs of rapidly mobile nitrogen sources. However, no-till systems for fall production do not appear to be a viable alternative under Florida conditions due to the rapid proliferation of weeds under the cover crop stubble. The addition of urban plant debris was associated with an increase in soil organic carbon and cation exchange capacity in sandy soils typical of those found in Florida.

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“…10-15% for Mg 2+ , while it deviated from a recommended ration of 2-5% for K + (Albrecht 1975(Albrecht , 1989. The base saturation ratio observed in this study has several advantages.…”

Section: Cationic Distribution and Balancementioning

confidence: 97%

Fifteen-year fallow altered the dynamics of soil phosphorus and cationic balance of a savannah Alfisol

Abdu

Etiene

2014

Archives of Agronomy and Soil Science

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This study was designed to evaluate changes in the dynamics of soil phosphorus and cationic balances of a savannah soil subjected to 45 years of continuous cultivation under different fertilizer management and later left fallow for 15 years. It was conducted on the experimental plots at the Institute for Agricultural Research, Ahmadu Bello University, Nigeria. Treatments consisted of nitrogen (N), phosphorus (P), potassium (K), cow dung manure (D) and their combination (DNPK). Results of P fractionation and cationic distribution were compared with previous studies on the same plot 15 years ago. Organic carbon increased from a range of 3-5 g kg −1 in 1997 to 10.9 g kg −1 in 2012. Similarly, the cation exchange capacity (CEC) of the soil increased from 6.40 cmol c kg −1 in 1997 to 16.4 cmol c kg 1 in the present study. The degree of saturation of the CEC by Ca 2+ was 68-79% and 10-20% for Mg 2+ , while that of K + was 1.5-2%. Although there was an uneven trend in depletion and enrichment of the various P pools, however, the fallow period substantially improved the CEC and the plant available P pools of the soil by more than 200% and 6-259%, respectively.

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Soil Fertility and Animal Health

Cited by 14 publications

References 0 publications

The Mechanism for the Synthesis of Starch and Its Relationship to Flagellin and to the Newly Proposed Structural Model for DNA. Part II.

The Mechanism for the Synthesis of Starch and Its Relationship to Flagellin and to the Newly Proposed Structural Model for DNA. Part II.

Yield potential and soil quality under alternative crop production practices for fresh market pepper

Fifteen-year fallow altered the dynamics of soil phosphorus and cationic balance of a savannah Alfisol

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