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Fandika I.R.,Massey University | Fandika I.R.,Kasinthula Agricultural Research Station | Kemp P.D.,Massey University | Millner J.P.,Massey University | And 2 more authors.
Agricultural Water Management | Year: 2015

There is renewed interest in heritage potatoes in New Zealand, USA and Europe because of their natural flavour and the premiums farmers receive in niche markets. However, a dearth of information on irrigation and nitrogen limit their successful management. This research investigated irrigation and N effects on yield and water use efficiency of heritage and modern potatoes. The 2009/2010 experiment was a split-plot and the 2010/2011 was a Split-Split-Plot with water regimes as the main treatments, four cultivars as sub-treatments and two nitrogen (N) levels, as sub-sub-treatments. The N treatment in 2010/2011 was 20 and 180kgNha-1 of urea at top dressing. Both experiments were basal dressed with 500kgha-1 of 12N:5.2P:14K6:S+2Mg:Ca at planting. The 2009/2010 was top dressed with 100kgNha-1. Data collected was subjected to analysis of variance (ANOVA), using general Linear Model procedure (PROC GLM) in statistical analysis system (SAS). Modern potatoes (Moonlight, Agria) were more responsive to irrigation and N than heritage potatoes (Moe Moe, Tutaekuri). Moe Moe produced as much marketable yield as modern cultivars while Tuteukui had low yields. Application of more than 80kgNha-1 decreased yield in heritage potatoes whereas, it increased the yield of modern potatoes. Full irrigation and 80kgNha-1 improved Moe Moe yields whereas partial irrigation and less than 80kgNha-1 improved Tutaekuri yields. Water use efficiency was high in modern potatoes whereas economic water productivity was high in heritage potatoes. Heritage potatoes tolerated water deficit although they required more water due to late maturity. It was concluded that premium market prices are important to the success of heritage potatoes whereas modern potatoes might use irrigation water more efficiently. It is evident that heritage potatoes can be grown successfully, and that on occasions they use valuable resources efficiently; however a price premium is required to maintain viability. © 2015 Elsevier B.V.

Fandika I.R.,Kasinthula Agricultural Research Station | Kadyampakeni D.,Chitedze Agricultural Research Station | Zingore S.,Chitedze Agricultural Research Station
Irrigation Science | Year: 2012

The performance of a bucket drip irrigation system (BDI) powered by treadle pump was evaluated on tomato and intercropped maize/bean crops, between 2005 and 2007 in Malawi. It was a split plot experiment with three replicates. The BDI system consisted of a 1,300-l tank mounted 1. 5 m above ground and connected with a 32-mm mainline and 15-mm lateral lines spaced at 1 m by 0. 6 m. A treadle pump was used to uplift water to the tank. Tomato and intercropped maize/bean were irrigated every 4 days. The system reduced labour and water by > 5% and it showed high uniform application depth and wetted diameter. Yields were significantly different between tomato varieties (P < 0. 05). Maize/bean yields were highly significantly different between monoculture, intercropping system and bean varieties (P < 0. 001). Consequently, an economic analysis shows that there is a significant difference, in terms of net income, between the various crop enterprises. Tomato was more valuable with BDI, compared to maize and beans. It can be concluded that BDI, powered by a treadle pump, saves labour and time and it provides uniform irrigation for crop production. Therefore, tomato is recommended for use with this system, compared to maize and bean. © 2011 Springer-Verlag.

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