OSU Hand Planter for the Developing World

Hand Planter Design/Specifications

Last update: November 16, 2020

Hand Planter Data/Results

Hand Planter Pictures, Maize Landscape

Hand Planter Design/Specifications

Hand Planter Drum(s)

Developing World (Pictures)

OSU Hand Planter Technology

Robert Lemings Design/Rustic Version March 2020

April 27, 2015. Methodology tested to eliminate misses (cable attached to the rotating drum, and beads surrounding the cable). Cable was attached to the very top of the seed resevoir (on the inside), using a spring (spring loading for cable movement up and down).

Use of internal cable and beads for seed agitation

New Design, March 13, 2015 (version sent to Panama, Roman Gordon, and Tennessee, Rebecca Harman)

Planter modifications since 2005

Hand Planter Internal Drums

Fertilizer Drum

July 2014, Hand Planter Weight (by components)

Greenseeder Hand Planter
	New Model	Old Model
	weight, g
Outer Housing	246	514
Inner Housing	190	223
Spring	48
Drum and Lever Assembly	43
Lever Retainer Washer and Clip	3
Tip	347
Tip Retainer Clip	33
VOLUME of SEED (3 piece handle)	1.5 kg
Seed Resevoir PVC + collar	1267
TOTAL	2176	2477

New Model Hand Planter with 1/8" housing

March 2014, Hand Planter Weight (by components)

Tube: 571.71 g
Middle part: 742.99 g
Tip : 542.97 g
Spring : 101.65 g

Total weight: 1959.32 g or 4.31 lbs.

March 2013 Indigenous Hand Planter Weight

(El Salvador survey)

Average weight (wood shaft, + tip) of 2.74 pounds.

OSU design (January 1, 2013) weighs 1.94 kg or 4.27 pounds.

Seed weight (depending on the shaft volume) is 1.5 kg.

TOTAL planter weight is over 6.4 pounds.

Jan 1, 2013 design
Knife (tip) 544
Shaft 571
Mechanical, 750
Spring, 79

Total = 1944 g + 1000g seed = 2.944 kg = 6.48 lbs

April 29, 2014

New tip design from Thailand, Joshua Ringer
New tip design, Tanzania, Tom Herlehy

Hand Planter Update, Thailand, Joshua Ringer

Randy Taylor, Nyle Wollenhaupt inspect new design

Hand Planter Assembly, May 21, 2013 (Sulochana Dhital and Rajen Bajgain)
(See it on YouTube)

Current Manufacturing

OSU Hand Planters/ Design, 2007 - present

Background On Farm Data

From Dr. Edgar Ascencio, CARE, El Salvador

6 Hand Planters, El Salvador

Hand Planter Iron tip, lbs Wood stick, lbs Total, lbs

1 0.75 1.5 2.25

2 0.35 2.5 2.85

3 1 2 3

4 0.9 2.25 3.15

5 0.5 1.5 2

6 1.2 2 3.2

Average 0.78 1.96 2.74

Std Dev 0.32 0.40 0.50

December 4, 2012, Candibyani (Indonesia), Peter Omara (Uganda), Mariana (Brazil)

Weight of empty planter

1.79kg (3.9 lb)

Planter Weight with seeds

medium flat (P0876HR)

2.69kg

Medium round (P0231HR)

2.70kg

Number of seeds/shaft volume

5650 seeds