Integrated plant nutrient supply for cassava

S Suganya, S Manickam
2016 Journal of Root Crops   unpublished
The soil test crop response (STCR) approach for targeted yield is unique in indicating both soil test based fertilizer dose and the level of yield that can be achieved with good agronomic practices. Cassava plays a significant role in the food, nutritional and employment security of the rural folk as a raw material for starch based industries in many parts of the world. Cassava is generally grown in Ultisols, Alfisols and Entisols which are poor in fertility. Field experiments were conducted
more » ... two seasons under cassava in red sandy loam soils (Typic Rhodustalf) of Yethapur at Tapioca and Castor Research Station, Yethapur during 2013-14 and 2014-15 using the variety 'Tapioca YTP 1'. There were eleven treatments replicated thrice in a randomized block design to study the effect of STCR based Integrated Plant Nutrient Supply (IPNS) for targeted yields on the growth, yield, quality and economics under irrigated conditions. Treatments differed significantly in the case of tuber yield and starch. STCR based fertilizer application along with composted poultry manure @ 10 t ha-1 recorded maximum tuber yield of 42.50 t ha-1 and 49.70 t ha-1 for an yield target of 40 and 50 t ha-1 respectively and the BC ratio (4.49) was higher for the latter treatment. The same treatments gave the maximum starch content of 26.9 and 25.4% respectively too. Hence, this innovative nutrition practice of STCR based IPNS for targeted yield plays a vital role in balanced nutrition, sustainable crop productivity and increasing profit.