Spatial variability of soil properties and wheat yields in an irrigated field

被引:6
作者
Bhatti, AU [1 ]
Bakhsh, A
Afzal, M
Gurmani, AH
机构
[1] NW Frontier Prov Agr Univ, Dept Soil Sci, Peshawar, Pakistan
[2] Agr Res Inst, Dera Ismail Khan, Pakistan
关键词
D O I
10.1080/00103629909370284
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
An irrigated farmer's field at Hafizabad village in Dera Ismail Khan District of Northwest Frontier Province of Pakistan was sampled at a regular grid spacing of 50x15 m from surface (15 cm) to study the spatial variability of soil properties and wheat yield. The farm measured 250x75 m. Soil samples collected were analyzed for soil pH, lime content, organic matter, mineral nitrogen (N), ammonium bicarbonate (AB)-DTPA-extractable phosphorus (P) and potassium (K), and soil texture. A uniformly trial on wheat with a uniform rate of 120 kg N ha(-1), 90 kg P2O5 ha(-1), and 60 kg K2O ha(-1) was laid out. The results showed that the soil P had the highest coefficient of variation (CV 46%) followed by organic matter (36.20%) and clay content (33.81%). Grain yield had also a considerable variation in the field (CV=31.84%). Geostatistical technique of semivariogram analysis showed that mineral N, AB-DTPA-extractable K, sand, silt, and clay content had the strong spatial structure. Maps of soil fertility and crop productivity of the farm was prepared using modern geostatistical technique of kriging. The farm was divided into different management zones based on these maps for fertility management.
引用
收藏
页码:1279 / 1290
页数:12
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