Phosphorus Responses by Dryland Spring Wheat as Influenced by Moisture Supplies<sup>1</sup>

Power, James F.; Brown, Paul L.; Army, T. J.; Klages, M. G.

doi:10.2134/agronj1961.00021962005300020013x

Cited by 28 publications

(17 citation statements)

References 7 publications

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“…2). Response to P has been shown to increase both with increasing soil water storage (Power et al 1961) and with decreasing rainfall (Matar, 1977;Day et al 1978). Obviously different explanations have to be given to such contrasting situations.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen and phosphorus fertilizers for wheat and barley in a semi-arid region

Krentos

Orphanos

1979

J. Agric. Sci.

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SUMMARYNineteen NP experiments were carried out with wheat and barley mostly in the Mesaoria plain of Cyprus over the period 1968–78. The fields were fallowed over the season preceding the experiments. Rainfall ranged from 68 to 405 mm. Kyperounda, a tall durum wheat, Pitic 62, a semi-dwarf aestivum wheat, and Athenais barley were the test varieties. No yield was obtained when rainfall was below 100 mm. Athenais barley consistently outyielded the wheat varieties, particularly Kyperounda, by up to 200% presumably because of earlier heading, which helpedthe crop to escape drought to a certain extent.Kyperounda wheat and Athenais barley mostly responded to 35 kg N/ha but Pitic 62 benefited from up to 70 kg N/ha. Fertilizer N not taken up in a year of extremely low rainfall remained in the soil and was available to the following crop.Response to P was more marked when rainfall was below 250 mm being linear over the rates tested (highest rate 26 kg P/ha). Athenais barley responded to P more than the other varieties. Bicarbonate-soluble soil P was between 1 and 10 mg/kg.Since rainfall is unpredictable it is recommended that 20–40 kg N/ha be applied atseeding together with 13–26 kg P/ha. A similar amount of N should be top dressed in late January. The higher amount refers to the semi-dwarf Pitic 62 wheat and could be increased further if the December-January rainfall, which normally constitutes 40% of the total, is high. These rates refer to crops grown after fallow. For continuous growing the rates would probably have to be increased.

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Section: Discussionmentioning

confidence: 99%

Nitrogen and phosphorus fertilizers for wheat and barley in a semi-arid region

Krentos

Orphanos

1979

J. Agric. Sci.

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“…The results of the fertilizer trials are erratic, and often fail to correlate with chemical soil tests (Power et al, 1961). A special problem arises on the fringe of the semi-arid regions in which rainfall is normally low and droughts are frequent.…”

Section: Soil Moisture and Nutrient Interactionsmentioning

confidence: 99%

Mineral Plant Nutrition and Fertilizer Use

1992

Agriculture in Dry Lands - Principles and Practice

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“…Power et al and Stewart et al, in their independent research studies, found strong correlation between crop yield of wheat and soil moisture content availability [4,5]. Machado et al also associated the crop yield in corn with the soil moisture content [6].…”

Section: Introductionmentioning

confidence: 99%

Prediction Models for the Estimation of Soil Moisture Content

Gorthi

Dou

2011

Volume 3: 2011 ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications, Parts a and B

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This thesis introduces the implementation of different supervised learning techniques for producing accurate estimates of soil moisture content using empirical information, including meteorological and remotely sensed data. The models thus developed can be extended to be used by the personal remote sensing systems developed in the Center for Self-Organizing Intelligent Systems (CSOIS). The different models employed extend over a wide range of machine-learning techniques starting from basic linear regression models through models based on Bayesian framework, decision tree learning, and recursive partitioning, to the modern nonlinear statistical data modeling tools like artificial neural networks. Also, ensembling methods such as bagging and boosting are implemented on all models for consid-

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Phosphorus Responses by Dryland Spring Wheat as Influenced by Moisture Supplies¹

Cited by 28 publications

References 7 publications

Nitrogen and phosphorus fertilizers for wheat and barley in a semi-arid region

Nitrogen and phosphorus fertilizers for wheat and barley in a semi-arid region

Mineral Plant Nutrition and Fertilizer Use

Prediction Models for the Estimation of Soil Moisture Content

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Phosphorus Responses by Dryland Spring Wheat as Influenced by Moisture Supplies1

Cited by 28 publications

References 7 publications

Nitrogen and phosphorus fertilizers for wheat and barley in a semi-arid region

Nitrogen and phosphorus fertilizers for wheat and barley in a semi-arid region

Mineral Plant Nutrition and Fertilizer Use

Prediction Models for the Estimation of Soil Moisture Content

Contact Info

Product

Resources

About

Phosphorus Responses by Dryland Spring Wheat as Influenced by Moisture Supplies¹