Response of dryland wheat to small supplemental irrigation and fertilizer nitrogen in submontane Punjab

Prihar, S. S.; Sandhu, K. S.; Singh, Manjeet; Verma, H. N.; Singh, Ranjodh

doi:10.1007/bf01054732

Cited by 15 publications

(4 citation statements)

References 6 publications

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“…According to these observations, a complementary relationship between the latter two factors exists in the studied area. This result is consistent with empirical studies that examine inputs interactions in irrigated agriculture both through field experiments (e.g., Prihar et al, 1989;Thompson et al, 2000) and modeling analysis (e.g., Bartolini et al, 2007;Chebil et al, 2004;Cai et al, 2008;Speelman et al, 2009). The complementarity between water and fertilizers in Tunisia was also reported by Chebil et al (2004) when they studied the technical progress of the irrigated systems in Teboulba region.…”

Section: Discussionsupporting

confidence: 89%

Irrigation pricing policies and its impact on agricultural inputs demand in Tunisia: A DEA-based methodology

Frija

Wossink

Buysse

et al. 2011

Journal of Environmental Management

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This paper estimates farmers' individual irrigation water demand functions employing the information hidden in individual farmers' technical efficiency. This information is extracted through the development of a new deductive methodology based on inverse Data Envelopment Analysis (DEA) models. The empirical results for Tunisia show that farmers who are more technically efficient have less elastic irrigation water demand functions; these farmers would adjust demand only to a limited extent and they can afford the water price. In contrast, water pricing significantly affects those that are less efficient. These farmers shift towards a different cropping pattern using significantly less water and more land when the price of water increases. Thus, higher water prices would threaten this category's livelihood if their efficiency is not improved. However, if the technical efficiency of these farmers were to improve, then it would be more difficult to reach water saving objectives since their demand will also become highly inelastic. The findings have important implications in view of the objectives of Tunisia water policy which include:full cost recovery, continuity of the irrigation activity, and water saving at the national level.

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Section: Discussionsupporting

confidence: 89%

Irrigation pricing policies and its impact on agricultural inputs demand in Tunisia: A DEA-based methodology

Frija

Wossink

Buysse

et al. 2011

Journal of Environmental Management

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“…Boron plays a significant role in the fertilization, flowering and fibre development and its deficiency increased boll shedding. Earlier, there were some reports of response to foliar spray of 0.1 to 0.2% borax on coarse textured soils of Punjab (Brar et al, 1983) with non-Bt cotton varieties. A field study conducted at Bathinda during kharif2005-06 on Bt cotton in a zinc deficient soil (0.35 mglkg soil) indicated that zinc sulphate was superior to zinc oxide (Brar et al, 2008a).…”

Section: Nutrient Managementmentioning

confidence: 99%

Bt cotton (Gossypium sp.) in India and its agronomic requirements - A review

M.V. VENUGOPALAN,

K. SANKARANARAYANAN,

D. BLAISE

et al. 2001

IJA

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lndia has emerged as a major global partner in the production, processing and trade of raw cotton and its fin- ished products. The genetically modified Bt cotton, containing the cry gene sourced from the soil bacterium Bacil- lus thuringiensis sub-species kurstaki, providing resistance against boil worms, represents a landmark in cotton research and development. The large-scale adoption of Bt cotton by Indian farmers in a span of 7 years is the power of this technology. Introduction of the Bt gene has alterzd the morphological, phenological and physiologi- cal characteristics of these introgressed cultivars. The development and commercialization of Bt cotton varieties like BN Bt and incorporation of herbicide tolerance are likely to further revolutonize the cotton production sce- nario. To harness the benefits of the Bt cotton and to sustain their yield potential, sound agro-techniques need to be standardized. This review provides an update on the agronomic research undertaken on Bt cotton especially under the diverse growing conditions in lndia and the effect of these agro-techniques on Cry toxin expression and fibre quality parameters.

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“…Stout et al (1988) reported that when precipitation was adequate and well distributed, N was the major factor controlling yield. Prihar et al (1989) observed that 85% of variation in dryland wheat yield could be explained by ®eld water supply and applied N. Campbell et al (1993) also reported an excellent relation between dryland wheat yield and available water supply, fertilizer N rate, and soil nitrate-N. However, these studies ignored the eect of the time distribution of water supply during the crop growing season.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Time Distribution of Water Supply and Fertilizer Nitrogen Rates in Relation to Targeted Wheat Yields

Sandhu

Arora

Chand³

et al. 2000

Ex. Agric.

Self Cite

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Long-term ®eld experiments were conducted at six dierent sites (representing dryland and irrigated environments) with wheat (Triticum aestivum) on sandy loam soils to generate a database relating available water supply and fertilizer nitrogen (N) rate to grain yield.Stepwise multiple regression analysis showed that water supply and fertilizer N at more than 53 cm a 71 and 103 kg ha 71 a 71 were unproductive. A method, based on the principle of equimarginal productivity of water in dierent periods of crop growth, has been used to estimate the optimum allocation of the variable amounts of water supply over the growing season. The optimized quantities of water in dierent periods of crop growth were then employed to compute fertilizer N requirement to achieve a given yield target. For medium grain yield targets (4±5 t ha 71 ), the range of substitution between fertilizer N and water for ecient resource use was quite wide.

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Response of dryland wheat to small supplemental irrigation and fertilizer nitrogen in submontane Punjab

Cited by 15 publications

References 6 publications

Irrigation pricing policies and its impact on agricultural inputs demand in Tunisia: A DEA-based methodology

Irrigation pricing policies and its impact on agricultural inputs demand in Tunisia: A DEA-based methodology

Bt cotton (Gossypium sp.) in India and its agronomic requirements - A review

Optimizing Time Distribution of Water Supply and Fertilizer Nitrogen Rates in Relation to Targeted Wheat Yields

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