Land equivalent ratios as influenced by planting geometry and legumes intercropping system
2002
Rashid, A. (Pakistan Agricultural Research Council, Islamabad (Pakistan). Natural Resources Div.) | Himayatullah | Ahmad, I. | Aslam, M.
The impact of planting geometry and legumes intercropping on the land equivalent ratios (LER) was studied at the Arid Zone Research Farm, Rata Kulachi, D.I. Khan. The highest LER of 1.55 and 1.56 was recorded with double row (30/90 cm) strip of sorghum + two rows of mungbean as intercrop between the 90 cm space of sorghum strips during 1999 and 2000, respectively. This suggested that sole cropping of sorghum would require 55 and 56 percent more area to achieve equivalent yield of the intercropped sorghum (double rows of sorghum + two rows of mungbean). The data further indicated that planting geometry significantly affected the grain yield of sorghum as well as those of intercrops. Double rows (30/90 cm) strips planting pattern significantly increased the grain yield by 4.88 and 6.90 percent than single rows 60 cm apart and triple rows (30/120 cm) strip planting pattern, respectively during 1999-00. Similar trend was observed in 2000-01. The grain yield of inter crop was 22.62% and 23.80% more in double and triple rows strip planting pattern than single row (0.349 t/ha), respectively, during 1999. The same trend was followed in the year 2000-01. However, sole sorghum produced more grain yield than sorghum associated with legumes in both the years. The interaction between planting geometry and legumes intercropping as regards grain yield of sorghum and intercrops was found non-significant in both the years. However, sole sorghum planted in the geometrical pattern of double rows strips produced more grain yield of 5.98 and 5.82 t/ha as compared to other treatments of interaction during 1999 and 2000, respectively.
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